Hold up on that second part

There is a situation where if your child finds love you should kick them out and that is if they're stealing the spouse of another one of your children

There was a case on either r/aita or r/relationship where the brother's boyfriend and the brother tricked the sister into thinking he was her boyfriend so that she could be the beard for 7 years in order to manipulate boyfriends parents for money in that case the parents should have turned against brother as he fundamentally ruined his sister's life

Keep in mind that's the type of scenario that could potentially lead to the suicide of the good child so no there's an exception to that rule